The only way is to look it up. The isotopic ratio can be determined on a mass spectrometer. Most periodic tables will have the Atomic Mass otherwise Google the element the wikipedia article will have the average mass of the element listed there. A few elements like Lead do have differing isotopic ratios depending where it was mined.
multiply the mass of each isotope by the percent of the isotope. Then add all of these numbers together to find the average atomic mass.
The mass of the naturally occurring mixture of isotopes for any element is called the atomic weight, whereas the mass of any individual isotope is simply called the isotopic mass.
I GUESS DDT, BHT
The answer is the atomic weight of the original element: It's the number on the top left of each element square of the Periodic Table.
Pure Hg is homogeneous. It's an element of the periodic table such as iron or oxygen ; it has 80 protons and about 120 neutrons (6 stable isotopes.
There are two ways to think about this. Chemically, the element is a pure substance (each atom has the same number of protons). Nuclear speaking, the element may be represented by a number of different isotopes (different number of neutrons).
All of the isotopes in an element's atomic masses divided by the amount of isotopes there are is the weighted-average mass of the mixture of an elements isotopes.
The mass of the naturally occurring mixture of isotopes for any element is called the atomic weight, whereas the mass of any individual isotope is simply called the isotopic mass.
It is called the Relative Atomic Mass.
Blood is a mixture containing plasma and blood cells.
Concrete is a mixture containing cement, sand, gravel and water.
Water is a compound. Seawater is a mixture containing salts as well as water.
Only of isotopes. Calcium is an element. No mixture of chemicals can ever be a single element. The atoms of any element, such as calcium, always have the same number of protons and the same number of electrons. The number of electrons in an atom is the same as the number of protons in that atom. Different Isotopes of an element have different numbers of neutrons in the nucleus, but this doesn't change any of the chemical properties.
and element is a pure substance containing only one type of atom A compound is a mixture of multiple elements that are bonded together to form molecules.
Mixture containing many elements and compounds.
The atomic mass is an average because most elements consist of a mixture of isotopes.
Most elements contain a mixture of two or more isotopes.
A mixture is an association of elements and compounds but without chemical bonding. Compugs contain chemical elements chemically bonded. An element contain the same type of atoms, including isotopes.